Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10
A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!
25
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
Every year your body replaces 98% of your atoms.
119
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
The human body contains over a billion miles of DNA.
147
The smallest human penis ever recorded was just 5/8 of an inch long!
77